IDFX Study Guide 2026
Everything you need to pass the IDFX exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 IDFX Exam Format at a Glance
📚 IDFX Topics to Study (32)
✍️ Sample IDFX Questions & Answers
1. The WELL Building Standard's 'Air' concept requires which minimum outdoor air ventilation standard as a Precondition?
WELL v2 Air Precondition A01 requires compliance with ASHRAE 62.1 (Ventilation for Acceptable Indoor Air Quality) as the minimum outdoor air ventilation rate baseline for all mechanically ventilated occupied spaces.
2. The Eames Lounge Chair and Ottoman (1956) was designed using what primary manufacturing innovation?
Charles and Ray Eames designed the Lounge Chair using molded plywood shells — curved in multiple planes using their heat-molded plywood technology — bonded to a cast aluminum swivel base, with separately attached leather-upholstered cushions.
3. Which design principle involves the use of repeated elements to create a sense of movement or flow?
Rhythm in design is achieved through the repetition or alternation of elements, creating a sense of organized movement and flow that guides the eye through a space. This can involve repeating colors, patterns, textures, or forms at regular intervals, establishing a visual beat or tempo that adds dynamism and cohesion.
4. At approximately what height above the floor is average standing adult eye level, used for centering artwork and signage?
Average standing eye level is approximately 60–66 inches from the floor, which is the standard reference height for placing artwork centers and informational signage.
5. IBC Section 1004 defines 'occupant load' for egress purposes. For a business occupancy (Group B), what is the occupant load factor per person?
IBC Table 1004.5 assigns an occupant load factor of 150 gross square feet per occupant for business occupancies (Group B offices). This means a 3,000 SF office has an assumed occupant load of 20 persons for egress calculations.
6. The 'Postmodern' design movement in interiors and architecture, emerging in the 1970s-80s, primarily reacted against which preceding movement?
Postmodernism directly reacted against the strictures of Modernism and the International Style — rejecting their austerity, universalism, and ban on ornament in favor of historical reference, irony, symbolism, color, and cultural context.